Flow simulation through pipe for different reynolds number

Aim:

To Run a pipe flow simulation with an inlet Reynolds number of 100,1000 and 10,000.

And for each of these cases to do the following

1. Place line probes at 95%, 90% and 85% of the pipe length.

2. Compare the normalized velocity profile at each of these locations

3. Normalize the velocity profile by the inlet velocity.

Procedure for simulation:

Step 1: Create a pipe with dimensions DIA: 16mm; Thickness : 2mm ; length: 100mm using sketch ; extrude and shell tools respectively.

Step 2 : Now create line probes at 85% ; 90% and 95 % of the pipe length using sketch tool.

Step 3: Now we create lid for the object to make it as an completely closed figure using create lid button in flow simulation.

Step 4: To create a new flow simulation.click New button and give the project name \"RE 100\" and give the input parameters say \"internal flow\" ; \"SI unit system\" and select \"air\" as fluid for the simulation and apply the parameters.

Step 5: To find the input velocities for different reynolds number i.e 100,1000,10000; calculate using octave or matlab and take kinematic viscosity as 1.48*10^-5 and diameter as 16*10^-3.

Step 6 : Now give the boundary conditions for the pipe. Give the calculated velocity as inlet velocity.0925 for Re=100 on one side of the pipe. Give static pressure as 101325 pa on other side of the pipe and give real wall condition for shell wall.

Step 7 : To define the click \"edit definition\" in global mesh and select manual and set 10 in x- direction ; 10 in y -direction and 16 in z- direction.

Step 8: Now we create cut plots at 85% ; 90% and 95% lines probes respectively to analyse the flow at that particulars.

Step 9 : Now create a xy plot for the three line probes for comparing the velocities at the line probes for different reynolds number.

Step 10 : Now run the flow simulation.

Step 11: Now create a new parametric study for studying the flow of air under different reynolds number. Give the input variables as velocity normal to the face and output parameter as select cut plots and xy plots. IN scenario give the input velocity as .0925 ; .925 and 9.25 for reynolds number 100,1000,10000 respectively.and the run simulation by clicking play button.

RESULT:

Thus the flows simulation through the pipe for different reynolds number at different cut plots say 85% ,90% ,95% has been succesfully achieved. And different plots has been resulted.